cpp/openttd-patchpack/source Files · src/newgrf_canal.h

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rubidium

(svn r20593) -Fix: (rlongago, r20547): long ago the service interval was int16, after which is got converted to Date except in the order backup. Much later I copied the savegame snippets from a vehicle and applied that on the order backup. Presto, reading/writing 32 bits (of Date) into 16 bits of ancient style service interval. That would then "spoil" the name pointer and that eventually crashes OpenTTD as it's likely to be an invalid pointer.

/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file newgrf_canal.h Handling of NewGRF canals. */

#ifndef NEWGRF_CANAL_H
#define NEWGRF_CANAL_H

#include "gfx_type.h"
#include "tile_type.h"
#include "newgrf_generic.h"
#include "newgrf_callbacks.h"

/**
 * List of different canal 'features'.
 * Each feature gets an entry in the canal spritegroup table
 */
enum CanalFeature {
	CF_WATERSLOPE,
	CF_LOCKS,
	CF_DIKES,
	CF_ICON,
	CF_DOCKS,
	CF_RIVER_SLOPE,
	CF_RIVER_EDGE,
	CF_END,
};

/** Flags controlling the display of canals. */
enum CanalFeatureFlag {
	CFF_HAS_FLAT_SPRITE = 0, ///< Additional flat ground sprite in the beginning.
};

/** Information about a water feature. */
struct WaterFeature {
	const SpriteGroup *group; ///< Sprite group to start resolving.
	const GRFFile *grffile;   ///< NewGRF where 'group' belongs to.
	uint8 callback_mask;      ///< Bitmask of canal callbacks that have to be called.
	uint8 flags;              ///< Flags controlling display.
};


/** Table of canal 'feature' sprite groups */
extern WaterFeature _water_feature[CF_END];


/**
 * Lookup the base sprite to use for a canal.
 * @param feature Which canal feature we want.
 * @param tile Tile index of canal, if appropriate.
 * @return Base sprite returned by GRF, or 0 if none.
 */
SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile);

uint16 GetCanalCallback(CallbackID callback, uint32 param1, uint32 param2, CanalFeature feature, TileIndex tile);
uint GetCanalSpriteOffset(CanalFeature feature, TileIndex tile, uint cur_offset);

#endif /* NEWGRF_CANAL_H */